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This paper reports on progress on a compact clock based on Coherent Population Trapping (CPT) using caesium vapour cell. The clock is working in a pulsed regime with two orthogonal linear polarizations made by two phase-locked lasers tuned to 895 nm and separated by 9.2 GHz. The short-term frequency stability is mainly limited by the Local Oscillator (LO) noise contribution and the laser relative...
Vapor cell atomic clocks are an interesting technology because they combine compactness, low power consumption and excellent relative frequency stability. Recently, due to better performing laser sources and innovative techniques to prepare and detect the atoms, several cell-based prototypes exhibiting unprecedented frequency stability have been developed. These techniques allow a reduction in the...
This paper presents the development of a 9.192 GHz microwave frequency synthesis chain (absolute and residual noise characterization) dedicated to be a local oscillator (LO) in a high-performance cesium vapor cell atomic clock based on coherent population trapping (CPT). The key components are an ultra low noise oven controlled quartz crystal oscillator (OCXO), multiplied to 9.2 GHz using a non-linear...
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